title: Extra long PR intervals.
abstract: This case review presents various manifestations of extra long PR intervals, an interesting form of atrioventricular (AV) block first described in 1977. All patients in this study had organic heart diseases and various combinations of multilevel conduction impairment. Perhaps the most common cause of chronic AV conduction impairment is the ill-defined degenerative and/or fibrotic damage to the intraventricular conduction system.
authors.affiliation: Cedars-Sinai Medical Center, Los Angeles, CA, USA.
authors.forename: Rashid A
authors.initials: RA
authors.lastname: Massumi
mesh_terms: D016275:Atrial Function; D054537:Atrioventricular Block / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D009200:Myocardial Contraction; D013997:Time Factors; D016276:Ventricular Function